SI9172 Vishay, SI9172 Datasheet - Page 2

• Manufacturer Part Number: SI9172
• Description: Psm Buck Converter With Dynamic Adjustable Output And Bypass Capability
• Manufacturer: Vishay

Si9172
Vishay Siliconix
V
BP/PSM, ENABLE, F
ADJ
Peak Output Current
Continuous Output Current
Storage Temperature
Operating Junction Temperature
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation
of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
V
BP/PSM, ENABLE
REF Capacitor
Output Capacitor
Notes
a.
b.
c.
d.
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2
Output
FB Threshold
Reference
Output Voltage
Power Supply Rejection
UVLO
Under Voltage Lockout (turn-on)
Hysteresis
Start-Up
Start-Up Delay Time
Soft Start Time
ENABLE, BP/PSM
Logic High
Logic Low
Output Capability/MOSFET
Maximum Bypass Output Current
Maximum PSM Output Current
MOSFET On-resistance
Supply Current
BP Mode
PSM Mode
Shutdown Mode
Thermal Shutdown
Threshold
Hysteresis
IN
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.
Typical values are for DESIGN AID ONLY, not guaranteed or subject to production testing.
Guaranteed by design and characterization, not subject to production testing.
For operation involving L
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parameter
d
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
c
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B,
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
L
X
c
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
X
frequency faster than 1-Hz the supply current may be higher.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UVLD
Symbol
r
PSRR
V
t
T
V
DELAY
DS(on)
I
T
V
UVLD
V
OUT
HYST
V
t
I
REF
S/D
ss
IN
IN
FB
IH
IL
HYST
–0.3 V to V
Test Conditions Unless Specified
–55 to 150_C
1.5 A (1 ms)
2.7 V to 6 V
0 V to V
IN
V
IN
ADJ = 2.5 V, V
+ 0.3 V
150_C
0.1 mF
New Product
10 mF
I
= 3.3 V, ENABLE = 0 V
2.7 V v V
6.5 V
REF
_
V
–25_C to 85_C
1 A
V
IN
IN
ADJ = 0.4 V
V
V
L = 1.5 mH
= 0, T
Up-Rising
IN
I
IN
IN
REF
w 3.3 V
= 3.3 V
= 3.3 V
IN
= 0
A
= 25_C
IN
v 6 V
w V
Power Dissipation (Package)
10-Pin MSOP (Q Suffix)
Thermal Impedance (Q
10-Pin MSOP
Notes
a.
b.
Inductor
PSM Load
Bypass Load
FB
Device mounted with all leads soldered or welded to PC board.
Derate 6.6 mW/ _C above 25_C.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
JA
b
)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Min
1.440
3.492
1.175
1.195
800
170
2.3
1.5
a
a
Limits
Typ
1.215
1.215
100
150
190
165
1.5
3.6
2.4
0.1
60
75
25
3
b
S-02890—Rev. A, 21–Dec-00
Document Number: 71379
Max
1.560
3.708
1.255
1.235
300
250
110
2.5
0.4
1
a
0 to 170 mA
0 to 800 mA
150_C/W
825 mW
Unit
1.5 mH
mW
mA
dB
ms
mA
mA
_
_C
ms
V
V
V
V